Corey FeldmanYes, I'll Sign Your Butt Cheek

4/5/2011 5:00 AM PDT

Corey Feldman -- Yes, I'll Sign Your Butt Cheek

Corey Feldman devalued a perfectly good ass last week ... when a female fan asked him to put his autograph on her right glute ... and TMZ has the pics.

We’re told the girl with the lovely caboose is a die-hard fan ... who had been doing a little drinking ... and was thrilled when Corey scribbled the message: “To Heather, with all my love, Corey Feldman"